Self-loading concrete mixing and distributing machine



H. O. STAMP. SELF LOADING CONCRETE MIXING AND DISTRIBUTING MACHINE.

1,349,231. APPLICATION FIL ED MAY 6, IEIIB. 10

ZSHEETS-SHEET I.

ATTORNEY H. 0" STAMP.

SELF LOADING CONCRETE MIXING AND DISTRIBUTING MACHINE.

APPLICATION FILED MAY 6, I918.

1 349,2 3 1 Patented Aug. 10, 1920.

7 SHEETS5HEET 2.

ATTORNEY H. 0. STAMP. SELF LOADING CONCRETE MIXING AND DISTRIBUTING MACHINE.

. APPLICATION FILED MAY 6', 1918. 1,349,231 Patented Aug. 10, 1920.

7 SHEETS-SHEET 3.

WITNESSES: INVENTOR ATTOHN EY H. 0. STAMP. SELF LOADING CONCRETE MIXING AND DISTRIBUTING MACHINE. APPLICATION man MAY 6, 191B.

1 ,349,23 1 Patented Aug. 10, 1920.

Z SHEETS-SHEET 4.

WITNESSES:

ATTORNEY H. 0. STAMP. SELF LOADING CONCRETE MIXING AND DISTRIBUTING MACHINE.

APPLICATION FILED MAY 6, I9IH.

Patented Aug. 10, 1920.

I SHEETS-SHEET 5.

INVENTOR %& J/// WITNESSES ATTDRN EY H. 0. STAMP. SELF LOADING CONCRETE MIXING AND DISTRIBUHNG MACHINE.

APPLICATION FILED MAY 6, 1918.

0 2 96 IP ,E on m m w. m m P L .AM k 1 3 2 WITNESSES:

BY 9 fly ATTORNEY H. 0. STAMP. SELF LOADING CONCRETE MIXING AND DISTRIBUTING MACHINE.

APPLICATION men MAY a. 1918.

1 ,349,23 1 Patented Aug. 10, 1920.

I SHEETSSI IEET 7.

WITNESSES: T

ATTORNEY UNITED STATES PATENT OFFICE.

HUGO O. STAMP, 0F MILWAUKEE, WISCONSIN.

Application filed May 6, 1918.

To all whom it may concern:

Be it known that I, HUGO O. STAMP, a citizen of the United States, and resident of Milwaukee, in the county of Milwaukee and State of Wisconsin, new and useful Improvements in Self-Loading Concrete Mixing and Distributing Machines; and I do hereby declare that the following is a full, clear, and exact description thereof.

My invention refers to self-loading and distributing mixing machines designed cspeciall with referei'ice to mixing concrete for roar-work and other purposes and, in a general way, it relates to improvements as disclosed in my patent for loading machine for concrete mixers and the like, No. 1,265,131, granted May 7, 1918, it being understood that my present invention particularly has reference to features that have been reduced to practice in a full-size workin machine.

bjects of my invention are to provide a receiving truck and an associated auxiliary truck having a flexible frame delivery conveyer supported at its ends by said trucks, with power-actuated means carried by the receiving truck for selectively dropping the conveyor frame to a position of rest upon the ground or to raise it therefrom intermediate of the trucks;

To provide, in conjunction with the de livery conveyor and receiving truck, a distributing conveyor, the receiving truck being equipped with an aggregate grading or separating apparatus operating in conjunction with a concrete mixer;

To rovide a motor-driven gear connection to the truck whereby it may be propelled, together with means for adjusting the deliver elevator by the power-actuated means, an a common control between the adjusting mechanism of the receiving elevator and the driving gear of the truck, whereby the co-nveyer must be lifted from its position of rest upon the ground before the receiving truck can be moved;

To provide a lever connection with the auxiliary truck and the receiving truck which carry the flexible conveyer frame, whereby, when the an endwise compensating movement results to prevent looking or cramping of the conve er when lifted;

0 provide the auxiliary truck with com- Specification of Letters Patent.

have invented certain conveyer frame is lifted,

Patented Aug. 10, 1920.

Serial No. 232,785.

panion supporting wheels arranged to balance the load at the outer end of the conveyer;

To provide the delivery conveyor and the distributing conveyor each with an adjustmg means and a common control for the adjustlng means of both conveyors whereby, upon certain predetermined adjustments of the delivery conveyer, the distributing conveyer is locked;

To provide clutch-controlled means for lifting the delivery conveyor associated with automatic means for throwing out the clutch and locking the convcyer at its lifted position;

T 0 provide a machine of this general type embodying a motor-driven truck, a delivery conveyor, an elevating conveyer, an aggregate separating and measuring device, a positive means for feeding the concrete aggregate upon a horizontal plane into the mixer drum, requiring minimum height and also serving as an apparatus for initial mix ing of the cement and water, a concrete mixer into which the aggregate and the mixed cement and water are discharged for final mixing, a distributor conveyor for re ceiving the mixed concrete from the mixer, together with means for horizontal adjustment of both the receiving, the delivery and distributing conveyors and means for verti cal adjustment of said delivery conveyor, and a common means for interlockingly controlling these two conveyors;

To provide, in a portable machine of the character referred to, a storage or overflow bin for the ingredients interposed between the separating mechanism and concrete mixer adapted to discharge into a horizontally disposed hydrating mixer which discharges into a concrete mixer, whereby the apparatus is capable of faster operation and is adapted to initially mix the water and cement into a mortar, followed by a mixture of this mortar with the sand and rock to form concrete, thus compensating for the difference in time re uired in mixing the several ingredients. he common practice is to mix all ingredients a given period, the length of this period being governe by the time required for the mixture of the cement and water, to produce the desired chemical action necessary for a fine grade of concrete. It is a known fact however that the mechanical mixture of the ingredients can be thoroughly performed in a fraction of such time and the purpose of this steps, whereby such ingredients which require a longer mixing time and those requiring the shorter time, each receive their necessary mixing without waste of time or power.

\Vith the above and other minor objects in view the invention consists in what is herein shown, described and claimed.

In the drawings Figure 1 represents a side elevation partly in section of a receiving truck embodying one exemplification of the features of my invention;

Fig. 2, a cross-section of the same, the section being indicated by line 22 of Fig. l

Fig. 3, an enlarged detailed sectional plan view of a front fragment of the machine, illustrating the common interlocking controlling mechanism of the delivery conveyer and the distributing conveyer, which con veyers are carried by the receiving truck. the section being indicated by lines 33 of Figs. 1 and 2;

Fig. 4, a detailed cross-section of the controlling mechanism, the section being indicated by line -i-4 of Fig. 3;

*ig. 5, an enlarged fragmentary view of the rearward end of the receiving truck, with parts broken away and parts in section, showing the distributing conveyer mmlllb nisin and certain elements of its interlocking control with relation to the delivery elevator.

Fig. 6, a detailed cross-section of the iii-- gredient-measuring hopper showing means for adjusting the hopper for predetermined measured quantities;

Fig. 7, a fragmentary view of the front end of the receiving truck, with parts broken away and parts in section, illustrat in; one end of the delivery conveyer and means for ad'ustably attaching it to said receiving truck.

Fig. 8, an enlarged detailed view of bucket units employed in connection with the delivery conveyer, parts bein broken away and in section to more clear? show details of construction;

Fig. 9, a cross-section of one of the buckets and its guide rails;

Fig. 10, a. side elevation of the auxiliary truck and its connecting means for supporting the outer end of the delivery conveyer frame;

Fig. 11 is a diagrammatic plan view of the manner of connecting the auxiliarytruck wheels, the same being mounted upon swivels and coupled for hand control so as to facilitate adjustment of the direction of the wheels and manual shift of the conveyer end;

Fig. 12, a diagrammatic elevation of the delivery conveyer frame illustrating its means of suspension and control, whereby the said frame is supported intermediate of the auxiliary and main truck by lever elements, and

Fig. l3, a diagrammatic plan view upon a. reduced scale, showing the entire apparatus, indicating in dotted lines the radial movements of the deli very conveyer and distributin conveyer relative to the receiving truck. eferring by characters to the drawings, 1 represents the main frame of a truck supported by suitably connected front and rear wheels 2, 2, respectively, the rear wheels being provided with sprocket wheels 3, as indicated in dotted lines Fig. 1, whereby drive is imparted to the truck from a counter-shaft 4 which is suitably supported in bearings with which the frame is provided and having at its ends sprocket pinions 4', 4. that are in chain drive connection with the traction wheels 2. The shaft 4 receives its motion through a chain of direct and re verse gears X from a main counter-shaft 5 through a chain and sprocket wheel connec tion 5, the same being mounted in bearings that are carried by members of an overhead skeleton frame which are carried by the frame beams 1 and constitute part of the truck-frame.

motor Y is mounted upon the truck frame and transmits motion through a through beveled gears 6 t0 the main counter-shaft, it being understood that the same is continuously driven. The counter-shaft 5 carries a clutch-controlled sprocket wheel 7 which is in belt drive connection with the corresponding sprocket wheel 7 secured to a conveyer drive-shaft members 1 at the front end of the truck. The conveyer drive shaft 8 beveled gear connection with a vertically disposed stud-shaft 9, which shaft is journaled in a sleeve 10 and constitutes part of a swiveled yoke 11. y 11 is mounted in an upper bearing 12 that projects from the truck-frame and a lower sleeve 10 of the yoke is mounted upon a fixed stud 12 which is carried by the lower sill of the truck frame.

As best shown in Figs. 1 and 7, the yoke 11 also carries a conveyer drive-shaft 13 which receives motion from the shaft 9 through beveled gear wheels 13, 13', the conveyer shaft being positioned horizontally and intersecting the pivot points of The conveyer shaft also carries it being guided by an idle sprocket-wheel 14' that is also mounted upon a yoke-supported shaft. Thus it will be understood that the bucket-carrying chain receives its drive from the shaft 5 and that said drive is imparted to the mechanism irrespective of the horizontal or vertical position of the conveyor mechanism which is suspended there rom' and which will be hereinafter specifically described.

Delivery cmweyer.

Inclined track levers 15' have their upper ends pivoted to side bars of the yoke 11, as best shown in Figs. 1 and 7, and the lower ends of these levers are connected by hinges 15" to track sections 16, 16', which sections are also hinged-1y connected at 17, as best shown in Fig. 12. In practice, the inner track section 16 is approximately onefourth of the length of the outer track section 16 and these track-sections, together with the track levers, constitute a continuous support for buckets 17 during their carrying movement, the track levers being discontinued at a proper point to allow the buckets to assume a discharging position. As best shown in Figs. 8 and 9 of the drawings, thebackets, when traveling with the lower or working stretch of the chain 15, are snpported by forward lugs 18 that engage Webs 18 of the track members and the opposite ends of said buckets are secured to wings of certain of the chain links. By this structure the load carried by the buckets is sustained by the forward lug engagemcnt with the tracks and the opposite end of the bucket is supported by engagement of an overhanging flange with the lip of the next leucketQ This means of suspension also sustains the carrying chain 15 against sagging, it being understood that the buckets are loaded as they travel toward the receiving truck either maniiially or by other means. In practice it is desirable to employ shovelers for the purpose of loading and, owing to the fact that the working stretch of the chain is traveling just clear of the ground, slight elevation or manual movement is required to feed the bucket units of the chain as they travel past the shovele-r, who indiscriminately feeds material, sand and gravel to them.

In order to add rigidity to the delivery conveyor frame structure, and also to support the idle stretch of the bucket-carrying chain, I provide upper rails 19, 19, respectively,'for the rail sections 16 and 16', and, when the conveyor is at rest in its operating position, these upper rail sections constitute in effect a continuous guide upon which the lugs of the bucket 18 travel. The upper rail sections 19 and 19' are connected to the lower rail sections by cross-struts 20 arranged at suitable intervals to provide the necessary rigidity and strength. In order to support the outer end of the delivery conveyor frame and to overcome tendency to trip or cramp the device when it is adjusted to meet various conditions, I provide an auxiliary truck, the same comprising a frame which is generally lj-shaped in plan, having side beams 20" constituting levers extending toward the receiving truck and intermediate of the ends of said levers they are provided with upwardly extended ears 20 which are pivotally connected to webs 21 that are fast to the ends of the upper rail sections 19. The auxiliary truck frame also carries vertically disposed bearings 22 for the reception of the shank portions 23 of forked members 23' that have mounted therein the truck wheels 24. These truck wheels are capable of a tracking adjustment from a position in alinement with the receiving conveyor frame to a position at right-angles thereto and, owing to the fact that they are spaced apart as best shown in Fig. 13, they form a twopoint bearing at the end of the conveyor frame so as to prevent tilting of the latter when the wheels are turned to track at a right-angle to the conveyor frame, as best shown in dotted lines Fig. ll of the drawings. Provision is made for a simultaneous adjustment of the wheels by securing arms 25 to the shanks 23 of the fork members and these arms in turn are coupled by a link 26. Hence, when the link is swung in either direction, the companion wheels will be simultaneously revolved or turned upon their bearings 22 to the desired angle, whereby the operator can manually swing the outer end of the conveyor frame from right to left to the extreme positions as indicated by dotted lines as shown in the diagram Fig. 13, or it can be swung at any intermediate angle.

It will be observed that, as the buckets travel over the sprocket-Wheel 14. of the yoke 11, they will take a tangential posi tion (the track levers being discontinued at a point where rotation begins) and dis charge cleanly into a boot 27 which is fixed to the yoke and, in turn, this boot delivers the material upon a chute 27 which is mounted upon the ends of the studs 12 and is thus held stationary with the receiving truck. The chute 27' is of suflicient width to permit play of the boot 27 therein incidental to radial adjustment of the delivery conveyor. The material is deflected from the chute 27' into buckets of an endless elevating conveyor 28 which is of the chain type and is trained about a sprocket-wheel 29 iournaled below the frame 1d a vorresponding wheel 29', the shaft of which is mounted in bearings that are fixed to the upper reachbeam of the skeleton frame. Motion is imparted to this elevating conveyer by an endless chain drive connection from the conveyor drive-shaft 8 that also indirectly imparts drive to the delivery conveyor chain 1.5. Thus the elevator and conveyor are adapted to revolve together under control of a single clutch.

From the foregoing description it will be All observed that, when the delivery conveyor is at work, the lower track rails or sections rest upon the ground at various points intermediate of its length and load strain is eliminated from the trucks. In its working position the rear end of the lever elements 20" of the auxiliary truck frame will be inclined downwardly as indicated in dotted lines Fig. 12, due to their rocking movement upon their pivot points. The rear ends of the levers carry sheaves 30 and se cured to said rear ends are the ends of cables 30, the same being trained over sheaves 31 that are mounted upon studs carried by the upper rail-sections 19. The cables are then trained around the sheaves ill) and again over the sheaves 31, and at a point a slight distance from said sheaves the cable is merged into a single stretch 3 l which runs back and engages the under side of a guide-sheave 32 and from thence it trains over a pulley 33 that is anchored to the re wiring truck-frame structure, as best shown in Fig. 1. The sheave 32 is supported at the upper end of a stirrup 34, the lower ends of which are connected to the track levers 15 adjacent the outer ends thereof. The pulley or sheave block 33 is provided with multiple sheaves. Connected to this block is the end of another cable 35 which is trained back and forth over floating sheaves 36 and certain of the sheaves The cable 35, together with the cable after leaving the sheave-block 31% are jointed at .2 and merged into a single stretch 32', which stretch is coiled about a drum 3?. The floating sheave-block ti -I3 forms an anchorage point for a pair of guy cables 38, 38', the guy cable 38 being connected to the spanner 34 of the delivery convc ver frame and the cable 38 to the outer rail section 19 of said frame.

By employing the above arrangement of supporting cables for the receiving delivery frame, it will be observed that a nicety in balancing the load is obtained when said frame is lifted from the ground for the purpose of shifting its position in a horizontal direction or for moving the truck from place to place.

lift of the deli very convey er frame.

For example, should the auxiliary truck wheels 24 be shifted to the position as indicated by dotted lines in Fig. ll, crosswise of, the frame and, in this position, motion be imparted to the drum 3? in the proper direction. the track lever sections 15' will describe an are about its yoke pivot. as indicated by dotted lines Fig. 12. Hence the conveyor frame in its entirety will tend to swing outwardly, but this outward swing is compensated for at its outer end due to the fact that the pivot connections between the auxiliary truck and said frame ends Will ceiving truck, being frictionally also swing outwardly upon an imaginary ard struck from the point of contact of the truck wheels 24 as the levers 20 'are lifted at their cable-connected ends. Obviously it will be understood that, without this 00111- pensating movement, if truclwwheels 2% were in the position just described, there would be a bind or tendency to buckle the conveyor frame incidental to its lift from the ground. It will also be observed that, owing to this balance of strain due to the peculiar cable arrangement, the load of the conveyor frame will be distributed between the receiving truck and the auxiliary truck in a manner to produce economic results and thereby prevent an overbalance of load upon either truck as it must be borne in mind that in practice the delivery conveyor must be of great length in order to render the device practical. For example, in the present machine, one-half of the load of the outer hinged section of the conveyor frame is carried by the inner frame section and the inner frame section, together with the link lever section, is supported by the re ceiving truck when elevated.

Distributing convey er.

The distributing conveyor comprises a boom 40 having a spanner 40 at its inner end, which is pivotally mounted upon a stud-shaft 41 and this stud-shaft, in turn, is carried by a'second spanner 41 that is loosely mounted upon a vertically disposed shaft $2, the load of the boom and spanner being sustained by a supporting bracket 43 that extends from the front end of the reengaged by the spanner ll. A drive-sheave (not shown) is mounted upon the shaft 41 and a corresponding idle sheave 44 is mounted at the outer end of the beam 40 for the reception of a drive cable 45, the ends of which are connected to a trolley-ban er 46 that carries a distributing bucket 4%. As best shown in Fig. 5, the trolley-bail is provided with suitable rollers which ride upon flanges of the conveyor beam 40. Motion is imparted to the bucket drive cable 45 by a mitered beveled gear connection with the shaft 42 and the upper end of shaft 42 is journaled. in a bracket projecting from the receiving truck frame having a beveled gear 49 fast thereon, which is adapted to be se lectively engaged by either one of a set of beveled gears 49, 49, that are loosely mounted upon a drive-shaft 50 and are adapted to be selectively locked to said shaft through the medium of a clutch 51 that is manually operated by a lever 51', the latter being also fulcrumed to the receiving truck frame.

The bucket 47 and its associated mechanism constitute a distributing conveyor and the boom is, in this instance, adapted to have horizontal adjustment about the shaft 42 and is supported at its end by a suitable guy cable connection 52, which is anchored to the aforesaid receiving truck-frame and may be adjusted for limited vertical movement of the track-beam 40.

A concrete mixer 53 oi any desired type is mounted upon the receiving truck-frame, having a discharge spout 53', whereby the finished product is delivered to the distributing conveyor bucket a? when the latter is in its loading position, as .best shown in Fig. 5 of the drawings. The concrete mixer illustrated is of the re oluble drum type and motion is imparted thereto through the driveshaft 6 by means of a pinion which meshes with a toothed ring 5i carried by the drum. This toothed ring, in turn, transmits motion to the distributing conveyor mechanism by means of a meshed pinion 54 which is fast upon the shaft 50.

Aggregate separating and hydrating mixer mechanism.

The upper sill of the receiving truck frame supports a revolublc screening drum 55, which drum is slightly inclined and open at its ends. The higher opened end is adapted to receive the aggregate from the elevator buckets 28. Positioned under the screening drum 55 is a storage hopper having a compartment 56 tor thereception of, in this instance, sand, and a second compartment 56' for the reception of crushed stone or gravel, which gravel or crushed stone is discharged from the lower open end of the screen. A third compartment 57 of the hopper is provided for the reception of cement that is positively fed therein by a worm 58 that is nested within a receiving boot 58', the worm being driven from the shaft 5 by a chain and sprocket-wheel connection, as best shown in Fig. 2. The respective compa meuts 56 and 56 of the hopper are provided with a door 59 and the cement compartment is controlled by an independent door 59'. These doors are independently actuated and control the discharge of the several materials stored in the hoppers. Supported directly under the hopper is a measuring bin having a cement compartment 60, a can compartment 60' and a stone or gravel compartment 60. These several compartments are likewise provided with discharge doors 6 61, the first being for the cement and the second for controlling the discharge of the sand and gravel. Thus it will be seen measured quantities of the several materials can be delivered to the combined hydrating mixer and feeder. sired to vary the proportions of the meas ured quantities of material. best shown in Fig. 6, one wall 62 of each of the bins may be hinged at an intermediate point an adjusted in or out so as to restrict or increase the bin volume. After such adjustment the If it is de-- jointed wall can be locked by a pin 63 which engages any one of a series of notches 63' of a sector that is last to the fixed walls of said bin.

( "oatiauous and intermittent feed.

.ln a machine of this character it is quite desirable for economic purposes that certain parts of the apparatus be continuous in operation and that other parts he intermittently operative. The continuously operative parts embrace the mechanism i'or feeding and screening the aggregate and the intermittently operative parts embrace the means for hydratin and mixing the material in batches. I once provision is made for taking care of the overllow of materials from the continuous feed mechanism by the storage hopper. With this in view 1 provide a horizontally disposed trough (5% directly under the measuring bins and the same has mounted therein an imperiorated feed worm or, the shaft of which receives its motion from a sprocket-gear chain connection from the drive shaft 6. By employing a. horizontally operated positive feeding means I avoid the necessary height which would be required for effecting a gravity feed, and thus produce a practical machine, it being obvious that, in a. portable machine, height is an important factor in order to allow for passage under tunnels, trolley wires, bridges, etc.

The mixing trough (id is provided at its discharge end with a gate 65, whereby the supply of material from the trough to the concrete mixer is controlled. Thus, when the door 65 is opened, the batch of hydrated cement, sand and gravel is discharged into the mixing drum 54.

In practice to eliect a proper mixture of the materials, the sand and gravel for example requires half the length of time re quircd to properly hydrate and mix the so ment so that the necessary chemical action takes place informing the mortar. Hence with the structure as shown, presuming that the storage bins 60, 60', G0", are loaded, the operator will first open the door (ll and simultaneously therewith admit the proper quantity of water to pass into the trough through the pipe 57. After the proper delay to permit hydrating the cement, the doors G1 and 65 of the cement mixer are simultaneously opened, whereby the measured batches of sand and gravel are admitted to the mortar and the entire aggregate is then discharged into the mixing drum 54: for final mixing, while another batch of cement and water is let into the hydrating mixer. Thus the mortar is first mixed in the hydrating tank, followed by admission of the sand and gravel. simultaneously with the discharge of material to the mixer whereby unnecessary delay is avoided. It, of course, follows that after the batches of measured material are discharged into the trough by opening the doors 61, 61 and 65, this series of doors is again closed and the hopper doors 59, 59, are then opened so as to permit the flow of material into the measuring bin necessary for the next batch.

Interlocking control for adjustment of the delivery and distributing conveyor-S.

Mounted upon the main drive shaft 5 is a delivery elevator lifting clutch 66, the same being adapted to lock and release a pinion 67, whereby the same is made fast to the shaft or freed therefrom. The pinion 67 is meshed with a gear-wheel 67' which constitutes a part of the winding drum 57 previously referred to and the pinion and drum are fast upon a studshaft 68 which is journaled in suitable bearings that constitute part of the frame of the truck The lifting-drum element also carries a frictionwheel 37 for the reception of a band-brake 69 and said band-brake is operatively connected to a knuckle 69 that forms part of a spanner arm 70 which controls the lifting clutch 66. The spanner-arm and clutch 66 are normally held in one direction by a coiled spring 71 the force of which spring frees the clutch from the pinion 67, whereby said pinion is disconnected from the shaft 5 and, in so functioning, the said spring, due to its pull upon the spannerarm, will cause the band-brake 69 to set and thereby lock the lifting drum 37 against movement simultaneously with release of said pinion 67. The spanner-arm is manually operated in opposition to its spring power by a hand-lever 70, whereby the clutch 66 is locked, it being understood that the locking of lever 70 is maintained by the spring 71. The stud-shaft 68 also has secured thereto a pinion 72 which meshes with a gear-wheel 72 that is loosely mounted upon the main shaft 5. The gear-wheel 72' carries a cam-shoe 73 which co acts with a lug 73' that forms part of the handlever 70'.

Lift of the (Zch'ocry convey/er.

To raise the delivery conveyer from its normal position of rest upon the ground, the operator pulls the lever 70' in opposition to its spring power. whereby the clutch 66 will lock the pinion 67 to the shaft 5 and simultaneously the band-brake 69 is freed from the brake-wheel 37'. The lever 70' is held in its manually shifted position due to the movement of the handbrake knuckle traveling across the center with reference to the line of force of the spring 71. Hence motion is imparted to the lifting drum 37, whereby the frame of the delivery conveyor will be raised between its supporting trucks,

as previously described, which lifted position is shown in Fig. 12 of the drawings. In effecting the extreme point of lift of the conveyor, the geanwheel 72 will have made approximately one-half of a revolution and, in describing this movement, the cam-shoe 73 will have engaged the lug 73 of lever 70, whereby the clutch mechanism 66 will be positively or automatically thrown out of gear and simultaneously the band-brake 67 will be set so as to lock the lifting drum 37 against rotation,-this lock of the handbrake being effected by the power of spring 71 which is directly in the line of force below the axis of the handbrake knuckle.

It is obvious that, should it be desirable to shift the position of the receiving truck, power must be applied to the transmission mechanism thereof through the train of gears X. This is effected by means of a clutch 74 which is mounted upon the shaft 5 and. when moved in one direction, it will lock the sprocket-wheel 5 of the driving gear connection to the shaft 5. It follows that when the clutch is shifted in the opposite direction this sprocket chain connection is free. The clutch is manually controlled by a spanner and lever connection 74', as best shown in Figs. 2, 3 and 4. Hence to apply power to the truck through the transmission train of gears X, the lever 74, as shown in Fig. 2, is drawn from left to right. In order to provide an interlocking mechanism whereby power cannot be pplied to the receiving truck when the delivery conveyer is resting upon the ground, I employ a blocking ring 75, which is integral with the gear-Wheel 72. The blocking ring is provided with a gap 76 therein, as best shown in Fig. 4. When the delivery conveyer frame is in its normal position of rest upon the ground, the gap 76 is out of registration with an offset portion 76' of the lever 74. Hence said offset portion will come in contact with the blocking ring and prevent throwing in the clutch 74 so that it is impossible to start the receiving truck under its own power when the conveyor is at rest. The receiving truck can, however, be started forward when the eoveyer is in its raised position due to the fact that the gap 76 in the blocking ring at this time is in register with the offset portion 76 of the clutch lever and said clutch lever can then be drawn from right to left and it will travel through the gap a suflicient distance to cause its associated clutch to function. It will be observed, by referring to Figs. l to 4 inclusive, that when the delivery co11- veyer is at rest, the gear-wheel 72 will always assume the position especially illustrated in Fig. 4. If the conveyor be lifted the wheel 72 will make a half turn and assume the position indicated in Fig. 5 of the drawings. It follows that, as soon as the band-brake 69 is released due to the engagement of the cam-shoe 73 with the lever lug 73', the drum will revolve in the opposite direction by drop of the conveyor and it is free to perform this function as the clutch 66 has been disengaged from the wheel 61', the lever 70 being held in an in termediate position against the action of the spring 71 to thus prevent application of the brake 69. Hence the stud-shaft 68 will make a reverse movement, whereby the wheel 72 will assume its normal position, as shown in Fig. 4. Briefly, the wheel 72 makes a half turn when the delivery conveyer is raised and makes a reverse movement when the conveyer is lowered so that it simply oscillates back and forth upon the shaft 5 in performing its functions. It also follows that, when the receiving truck is traveling under its own power, with the receiving conveyor lifted from the ground, the said conveyor cannot be inadvertently lowered unless the clutch 74 is first shifted, whereby the motive power is disconnected from the driving gear of said truck.

In order to more fully understand the horizontal adjustments of the delivery conveyer, with particular reference to Figs. 3, 4 and i, it will be seen that the yoke sleeve 10 has fast thereon a pinion 77, which pinion is meshed with companion rack-plungers 78 that are reciprocatively guided in boxes 78' which are fast to one member of the receiving truck frame. The plungers are positioned to engage av spring-controlled rock-arm 79 which rock-arm is fast upon a rock-shaft T9 and this shaft also carries a pinion 80 that meshes with a toothed locking bar 81. One end of the locking-bar is grooved and adapted to ride upon a face cam 83' which is carried by the gear-wheel T2. The opposite end of the locking bar supported in n bearing block 82 and has slight side play therein whereby the camsupported end is capable of a swinging movement due to action of the cam. When the delivery conveyor is at rest, the locking bar 81 assumes the position shown in Figs. 3 and 4 of the drawings with relation to its controlling cam 81. This locking-bar is adapted to block downward movement of a, thrust-rod 83. the upper end of which is ri'minctcil to a bell-crank lever 83 and said bell-crank lover is, in turn. connected by a link 8i to the clutch controlling lever 51 of the distributing conveyor. it being understood that the thrust-rod and its associated parts are suitably mounted and supported by certain of the truck frame elements.

As best shown in 3. the thrust-rod 83 is out of alinemcnt with the locking-bar 81 and hence if the delivery conveyer is lifted from its position of rest, it is obvious that there will be no movement of the rocking lever T9 and its associated parts. However, gear-wheel 72 will make a half turn and its associatei'l face-cam 81 will cause the locking bar 81 to shift its position so as to be alined with the end of the thrust-rod 83, at which time the gear-wheel 72 will have completed its half revolution and will be locked in the position shown in Fig. 5, but, owing to the fact that no end movement has been imparted to the locking-bar 81, the thrust-rod H3 and its associated parts are mpaiz-lc of movement. that is. although the delivery conveyor has now been raised from the ground the distributer conveyor can be freely operated under control of its clutch meriianism. his result is desirable in the machine for the reason that although the delivery conveyor is lifted from its position of rest there is no liability of overbalancing the receiving; truck due to the weight of said conveyor because this weight is centrally disposed and evenly distributed. Hence in this position the distributing conveyor can be swung in any selected point about its axis ol movement with reference to a horizontal plane. It is a serious objection, however, in practice, to permit operation of the distributing conveyor, in moving bucket 47 outwardly on its boom when the delivery conveyor is lifted from its position of rest and disposed at an angle to the receiving truck, whereby an overbalenrc of the machine is 'iossiblc. Hence a provision is made for locking the distributing conveyor clutch in a neutral position when the delivery conveyor is lifted from the ground and adjusted horizontally from an imaginary straight line drawn through the receiving truck. The desired object is accomplished by menipulation of the rocking lever 79 and its associated parts in the following manner: Should the delivery conveyer be raised from the ground and shifted horizontally, it will cause more or less rotation of the gear-wheel 7'7. and this motion of the gear-wheel will be transmitted to the rach-plungers 79, which plungers will move in opposite directions. That plunger which moves toward the receiving truck will engage the rockerarm ?9 and impart. through its gear con nection. a iong'itudinal movement to the Ionizing-bar 81, whereby its cemengeged end will move beyond the end of the thrust-rod 8:1. as shown n Fig. 5. It should be borne in mind that the (am 91', previous to this movement. has shifted the horizontal plane of the locking-bar 81 so that when the movement just described takes place, the camengaged end of said locking-bar is directly under the end of the thrust-rod and will thus serve to block downward movement of the same. Obviously the clutch lever 51'. which is normally in a neutral position, can

not be moved to cause the clutch 51 to lock the gear 49 fast to the shaft 50, which action is necessary in order to impart drive to the distributing conveyor parts whereby the cable 45 will cause the bucket L7 to move toward the end of the beam -10. Hence, when the clutch-lever 51 is locked in the position ust mentioned, the conveyor bucket 47, although loaded, cannot be shifted from its position under the mixing drum spout and the weight of the load will thus serve to maintain balance until such time as the delivery conveyor is released from its clo vated position so that it can by gravity come to rest upon the ground.

The release of the delivery conveyor, as previously stated, is elfocted by a manual operation of the conveyor lifting clutch lever whereby the band-brake clutch is freed to permit the conveyor to drop and, simultaneously with this action, the camcarrying gear-wheel 72' will make a reverse half turn, coming to its normal position, whereby the clutch-controlling lever 51 is released for manipulation due to the fact that the locking bar 81 has been withdrawn from the line of travel of the rod 83.

Thus it will be seen that, by employing the interlocking clutch-controlled mechanism described, the receiving truck cannot be shifted under power until such time as the delivery conveyor is lifted from the ground and if this conveyor is adjusted horizontally from a predetermined position, the interlocking mechanism will prevent functioning of the distributing conveyor until such time as the delivery conveyor is at rest again and, furthermore, the interlocking clutch mechanism is such that, when the delivery conveyor is resting upon the ground, irrespective of its adjusted position, the distributing conveyor can be adjusted and operated within its entire scope independent of the other mechanism, all in terlocking common control of the clutch mechanism being for the purpose of avoiding damage to the machine by improper manipulation, whereby the machine as a whole is rendered what is known in mechanics as fool-proof.

The sprocket and chain drive connection 7, 7', from the shaft 5 for the delivery conveyer is controlled by a manually operative chitch 7 which is mounted upon said shaft and adapted to lock or free the sprocket wheel 7 from the shaft.

While I have shown and described one exomplification of my invention in minute dotail throughout, it is manifest that I may vary all structural features within the knowledge of the skilled mechanic and a liberal interpretation of the claims, without departing from the spirit of my invention.

I claim:

1. A portable loading and distributing machine of the character described comprising a receiving truck, an adjustable delivery conveyor, a distributing conveyor, means for operating the distributing conveyor and means controlled by adjustment of the delivery conveyor for preventing operation of the distributing conveyor.

2. A portable loading and distributing machine of the character described comprising a receiving truck, an adjustable delivery conveyor, a distributing conveyor, means controlled by adjustment of the delivery conveyor for preventing operation of the distributing conveyor, means for raising said delivery conveyor for adjustment thereof, means for operating said distributing convoyor and means operable by lifting the delivery conveyor for preventing operation of the distributing conveyor.

3. A portable loading and distributing machine of the character described comprising a receiving truck, a motor-driven gear connection for the truck, a delivery conveyer, IllC'iHlH for adjusting the delivery conveyer, and an interlocking controlling means for the conveyor adjusting means and the truck-driving gear.

4. A portable loading and distributing machine of the character described comprising a receiving truck, a delivery conveyor, a distributing conveyor, adjusting means for the delivery conveyor, operating means for the distributing conveyor, means permitting adjustment of the delivery conveyor in a predetermined direction independent of the distributing conveyor, and interlocking controlling means for adjusting both conveyors in other predetermined directions.

5. A portable loading and distributing machine of the character described comprising a receiving truck, a delivery conveyor having one end mounted upon the receiving truck, an auxiliary truck for supporting the other end thereof, means for vertically adjusting the conveyor between the trucks, at distributing conveyor supported by the receiving truck, means for operating the distributing conveyor independent of the adjusting means of the delivery conveyor when the same is in a predetermined position, and means for locking the operating means of the distributing conveyor when the delivering conveyor is in another predotorminod adjusted position.

6. A portable loading and distributing machine of the character described comprising a receiving truck, a delivery conveyer having one end mounted thereon, an auxiliary truck for supporting the outer end of the delivery conveyor, means for adjusting the delivery conveyor vertically and permitting horizontal adjustment thereof with respect to the receiving truck, a dis igm tributing conveyor, adjustable horizontally with respect to the receiving truck, an aggregate separating and measuring appara tus mounted upon the receiving truck between the conveyors, and a concrete mixing apparatus located between the aggregate separating and measuring apparatus and the distributing conveyer.

7. A portable loading and distributing machine of the character described com prising a receiving truck, a motor-driven transmission gear for the truck, a clutch for controlling the same, a delivery conveyer having its inner end connected with the receiving truck, an auxiliary truck for supporting the outer end of the delivery conveyor, a lifting means connected to the delivery conveyer between its trucks, a clutch for controlling the lifting meanspand an interlocking mechanism associated with the lifting clutch and motor-controlling clutch of the receiving truck.

8. A portable loading and distributing machine of the character described comprising a receiving truck, a motor-driven transmission gear for the truck, a clutch for controlling the same, a delivery conveyor having its inner end connected with the receiving truck, an auxiliary truck for supporting the outer end of the delivery conveyer, a lifting means connected to the delivery conveyer frame between its trucks, a clutch for controlling the lifting means, an interlocking mechanism associated with the lifting clutch and motor-controlling clutch of the receiving truck, a distributing conveyer mounted upon the receiving truck, a clutchcontrolled operating mechanism for the distributing conveyer, and an interlocking mechanism between the distributing conveyer clutch control and the delivery conveyer clutch control.

9. In a portable loading and distributing machine of the character described, a receiving truck, a delivery conveyer, a distributing conveyer, both conveyers being adjustable horizontally with respect to the receiving truck, means for operating the distributing conveyor and means operable incidental to adjustment of the delivery conveyer for preventing operation of the dis tributing conveyor operating means.

10. A portable loading and distributing machine of the character described comprising a motor-driven receiving truck, an auxiliary truck, a flexible conveyer frame supported at its end portions between said trucks, and means carried by the receiving truck for adjusting the conveyer frame to permit the same to rest upon the ground intermediate of its truck-supported ends or to be raised therefrom.

11;. A portable loading and distributing machine of the character described comprising a motor-driven receiving truck, an anxiliary truck, a flexible conveyer frame supported at its ends between said trucks, means carried by the receiving truck for adjusting the conveyer frame to permit the same to rest upon the ground intermediate of its truck-supported ends or to be raised therefrom, and means for permitting adjustment of the couveyer-frame together with its auxiliary truck horizontally about the receiving truck.

12. A portable loading and distributing machine of the character described comprising a motor-driven receiving truck, an auxiliary truck, a ilcxible conveyer frame supported at its ends between said trucks, at power-driven adjusting mechanism carried by the receiving truck, a cable connection between the auxiliary truck and adjusting mechanisn'n and another cable connection between the flexible frame and the adjusting mechanism whereby the auxiliary frame is raised in sections and its weight distributed between the trucks.

13. A portable loading and distributing machine of the character described comprising a receiving truck, a flexible convcyei' having its inner end connected to the recei.v-. ing truck for universal adjustment, an auxiliary truck frame in pivotal union with the outer end of the conveyer frame, a powerdriven lifting means carried by the receiving truck, a cable connection between the frame of the auxiliary truck, and the outer end portion of the conveyer frame and connected to the lifting means, and a second cable connection between the inner end of the flexible conveyer frame and said lifting means.

'14. A portable loading and distributing machine of the character described comprising a main receiving truck, a conveyer frame having one end connected with the receiving truck, an auxiliary truck frame adjustnbly connected to the outer end portion of the convcyer frame, spaced supporting wheels in swivel union with the auxiliary truck frame and adapted to support the outer end of the frame, a common means for adj usting the wheels about their swivel points, and means for raising and lowering the conveyor frame between the trucks.

15. A portable loading and distributing machine of the character described comprising a receiving truck, an auxiliary truck, a conveyer frame comprising sections in hinged connection between the trucks adjustable means connecting the outer end of the conveyer frame with the auxiliary truck, and adjustable means connecting the inner end of the sectional conveyer frame with the receiving truck.

16. A portable loading and distributing machine of the character described comprising a receiving truck and an auxiliary truck, a conveyer frame having its end adjustably secured to the trucks, power-actuated means for raising the conveyer-frame intermediate of its supporting trucks, automatic means for locking the conveyer frame in its raised position, and manually controlled means for releasing the automatically locking means to permit the conveyer frame to come to rest by gravity.

1?. A portable loading and distributing machine of the character described comprising a receiving truck, a delivery conveyer having one end supported by the receiving truck, an auxiliary truck for supporting the opposite end of the delivery conveyer, a distributing conveyer, liftin means for the delivery conveyer carried by the truck, said delivery conveyer being adjustable horizontally while in its lifted position, means for operating the distributing conveyer, and means for locking the distributing conveyer while the delivery conveyer is held in its lifted position out of balanced alinement with the receiving truck.

18. A portable loading and distributing machine comprising a receiving truck, a delivery conveyer mounted at one end of the truck, means for moving the same vertically to permit horizontal adjustment thereof, a distributing conveyer mounted at the opposite end of the truck, means for operating the distributing conveyer including a power driven feed mechanism, and means for locking feed of the distributing conveyer when the delivery conveyer is in a predetermined adjusted position.

19. A portable loading and distributing machine of the character described, comprising a receiving truck, a delivery conveyer connected therewith, a distributing conveyer connected to said truck, means for elevating said delivery conveyer, means for automatically stopping such elevating means and arresting said delivery conveyer in elevated position, and means for rendering said distributing conveyer inoperative while said delivery conveyer is in elevated position.

20. A portable loading machine of the cha acter described comprising a receiving truck, a delivery conveyer connected therewith, a power driven traction mechanism for said truck, means for lifting and lowering said delivery conveyer, and means for rendering said traction mechanism inoperative when said delivery conveyer is in lowered position.

21. A portable loading machine of the character described comprising a receiving truck. a delivery conveyer connected therewith, means for elevating said delivery conveyer, a power driven traction mechanism for said truck, means for locking such traction mechanism while said delivery conve er is in lowered position, means for releasing said traction locking means when delivery conveyer elevated, and means for locking same in elevated position while traction mechanism is operating.

22. A portable loading machine of the character described comprising a receiving truck, a delivery conveyer connected there with, means for raisin and lowering said conveyer, a self-propelled mechanism for said truck, means for locking said conveyer in raised position, while such self-propelling mechanism is operating, means for automatically releasing such conveyer locking means when said self-propelling mechanism sto s, and means for locking such self-pro pel ing mechanism when said conveyer is in lowered position.

23. A portable loading machine of the character described comprising a receivin truck, a delivery conveyer having one end mounted thereon, an auxiliary truck supporting the outer end of said delivery conveyer, lifting means for elevating said conveyer from its normal position on the ground, means for automatically disengaging said lifting means and means for automatically locking said conveyer in elevated position when said lifting means are disengaged.

24. A loading machine of the character described comprising a receiving truck, a conveyer connected therewith for horizontal and vertical movement, a plurality of wl'ieels supporting the outer end of said conveyer, each swiveling about a fixed axis, means for adjusting said wheels about their axis at varying angles to said conveyer whereby the conveyer may be swung concentrically about said truck portion or the machine moved bodily with the conveyor extending at a predetermined angle thereto.

25. A loading machine of the character described comprising a receiving truck, a downwardly inclined conveyer section carried thereby and connected therewith for horizontal and vertical movements, a second conveyer section hinged to said downwardly inclined section, a third section hinged to the second section, wheels for supporting said third section, and lifting means attached to the ends of said first and second sections and coiiperating with a cable operated means in connection with said wheels for lifting said conveyer from the ground, whereby the inner end is supported by said truck and the outer end by said wheels.

26. In a combined loading, mixing and distributing machine, a body truck portion, a boom carried thereby for horizontal movement and extending rearwardly therefrom, a carrier movable backward and forward on said boom, means for actuating said carrier, a framework extending forwardly from said truck portion and mounted for horizontal swinging movement and normally resting on the ground, means for lifting said framework from the ground and means for locking said carrier actuating means against operation upon lifting and swinging movement of said framework, and means for rendering such locking means ineffective when said framework is extended in a predetermined portion of its horizontal path.

27. In a concrete mixer, a body truck portion, a boom supported thereby and extending rearwardl therefrom, a carrier movable along said boom, means for actuating said carrier, a framework extending forwardly from said truck portion normally resting on the ground, means for lifting said framework, and means for locking said carrier actuating means against operation upon lifting and swinging movement of said framework.

28. In a concrete mixer, a body truck portion, a rearwardly extending boom mounted on said truck portion; for horizontal pivotal movement, a carrier movable along said boom, means for actuating said carrier, a forwardly extending loading conveyer mounted on tal and vertical movement and normally resting on the ground, an outer wheeled support for said conveyer, means for lifting said conveyer thereby throwing its weight onto said truck portion and said outer wheeled support, and means for locking said carrier actuating means against operation upon lifting and swinging movement of said conveyer.

29. A loading machine of the character described comprising a receiving truck, a conveyer having one end in pivotal union with the truck for horizontal swing, means for vertically adjusting the conveyer with relation to the receiving truck, a twowheeled truck for supporting the opposite end of the conveyer, and means for horizontally swiveling the wheels of said last mentioned truck.

30. A loading machine of the character described comprising a receiving truck, an auxiliary truck, an elongated delivery conveyer having one end portion in pivotal union with the receiving truck for horizontal swinging movement, the other end of the conveyer frame having pivotal union with the auxiliary truck for relative vertical movement and means for procuring such relative vertical movement of the conveyer frame and the auxiliary truck for lifting the truck.

31. A loading machine of the character described comprising a receiving truck, an elongated delivery conveyer having one end portion in pivotal union with the receiving truck for horizontal swinging movement, a wheeled auxiliary truck connected with the other end portion of the conveyer frame said truck portion for horizon-.

and means for horizontally swiveling the Wheeled support of said auxiliary truck whereby said auxiliary truck may advance parallel to the receiving truck in offset relation to the path of the receiving truck.

32. A machine of the class described com prising a main wheeled frame, a collecting conveyer carried by and extending forwardly from the main frame, a delivery conveyer carried by and extending rearwardly from the main frame, a concrete mixer carried by the main frame for receiving material supplied by the collecting conveyer and discharging said material to the distributing conveyer, and means for pro pelling the main frame.

33. A machine of the class described including a wheeled main frame, a work receiving receptacle carried by said main frame, a conveyer frame extending forwardly from the main frame and including upper and lower longitudinal tracks, an endless series of buckets traveling on said tracks, the buckets traveling on the lower tracks having their mouths disposed upwardly whereby to discharge upon movement to the upper stretch, and an elevator for receiving work material discharged from said buckets for conveying said work material to the work receiving receptacle.

34. A machine of the class described including a wheeled main frame, a work receiving receptacle carried by said main frame, a conveyer frame extending forwardly from the main frame and including upper and lower longitudinal tracks, the

inner end portions of said tracks being upwardly inclined, an endless series of buckets traveling on said tracks, the buckets traveling on the lower tracks having their mouths disposed upwardly whereby to discharge upon movement to the upper stretch, and an elevator for receiving work material discharged from said buckets for conveying said work material to the work receiving recepta'cle.

35. In a loading machine of the class described, an elongated framework, longitudinally extending means for conveying carried by said framework, a rear wheeled sup port for said framework in pivotal connection therewith, a front wheeled support, and means for swiveling the wheels of said front wheeled support whereby it may advance parallel to the rear wheeled support in offset relation to the path of said rear truck.

In testimony that I claim the foregoing I have hereunto set my hand at Milwaukee, in in the county of Milwaukee and State of Wisconsin.

Hneo o. STAMP. 

